AS2501
AS2501
APNIC
Education
Data retrieved at
This AS-only summary is estimated from a sample IP within a prefix announced by this AS, not from a specific query. Search a real IP for exact details.
Network
AS Number
AS2501
Company
The University of Tokyo
AS Domain
u-tokyo.ac.jp
Using host.io for pre-visualize domains.
Type
Education
IPv4 Addresses
200,704
IPv6 Addresses
7.92×10²⁸
Registry (RIR)
APNIC
157.82.0.0/16
Abuse Contacts
Not available
Announced Prefixes (6)
Netblock
Num. of IPs
RPKI
RPKI Origin Validation
RPKI verifies that an IP prefix is legitimately announced by the authorized Autonomous System (ASN) using Route Origin Authorizations (ROAs).
Unknown
No valid ROA was found for this prefix.
UNKNOWN
Validated Prefix
157.82.0.0/16
Authorized ASN
AS2501
IP Geolocation
Country
Japan
Continent
Asia
European Union
No
Phone prefix
+81
Currency
Japanese Yen (JPY ¥)
Approximate location (country-level)
Open in Maps